AU561989B2 - Monitoring pit formation - Google Patents

Monitoring pit formation

Info

Publication number
AU561989B2
AU561989B2 AU21145/83A AU2114583A AU561989B2 AU 561989 B2 AU561989 B2 AU 561989B2 AU 21145/83 A AU21145/83 A AU 21145/83A AU 2114583 A AU2114583 A AU 2114583A AU 561989 B2 AU561989 B2 AU 561989B2
Authority
AU
Australia
Prior art keywords
pit formation
monitoring pit
pits
monitoring
exposure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
AU21145/83A
Other versions
AU2114583A (en
Inventor
Eric Jan Frankfort
Robert Mcfarlane
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of AU2114583A publication Critical patent/AU2114583A/en
Application granted granted Critical
Publication of AU561989B2 publication Critical patent/AU561989B2/en
Assigned to PHILIPS ELECTRONICS N.V. reassignment PHILIPS ELECTRONICS N.V. Request to Amend Deed and Register Assignors: N.V. PHILIPS GLOEILAMPENFABRIEKEN
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045—Recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam

Abstract

Apparatus for recording data by means of a beam or radiation on a recording medium which upon exposure to the beam undergoes optically detectable changes in the form of pits, which apparatus includes means for reducing the beam intensity as a result of pit initiation thereby forming more accurate pits.
AU21145/83A 1982-11-12 1983-11-10 Monitoring pit formation Ceased AU561989B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US440897 1982-11-12
US06/440,897 US4562567A (en) 1982-11-12 1982-11-12 Apparatus for controlling the write beam in an optical data recording system

Publications (2)

Publication Number Publication Date
AU2114583A AU2114583A (en) 1984-05-17
AU561989B2 true AU561989B2 (en) 1987-05-21

Family

ID=23750640

Family Applications (1)

Application Number Title Priority Date Filing Date
AU21145/83A Ceased AU561989B2 (en) 1982-11-12 1983-11-10 Monitoring pit formation

Country Status (8)

Country Link
US (1) US4562567A (en)
EP (1) EP0109130B1 (en)
JP (1) JPS59116946A (en)
AT (1) ATE37625T1 (en)
AU (1) AU561989B2 (en)
CA (1) CA1213049A (en)
DE (1) DE3378142D1 (en)
ES (1) ES527159A0 (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2546325B1 (en) * 1983-05-20 1988-07-08 Thomson Csf OPTICAL POWER CALIBRATION METHOD AND DEVICE APPLIED TO AN OPTICAL DISC FOR DATA RECORDING
JPH0821173B2 (en) * 1984-07-27 1996-03-04 松下電器産業株式会社 Semiconductor laser drive circuit
US4695994A (en) * 1985-04-05 1987-09-22 Laser Magnetic Storage International Company Method and apparatus for varying laser intensity level
JP2605015B2 (en) * 1985-06-26 1997-04-30 インターナショナル・ビジネス・マシーンズ・コーポレーション Information-bearing signal recorder for thermal induction recording
EP0243976B1 (en) * 1986-05-02 1996-09-04 Hitachi, Ltd. Method for recording, reproducing and erasing information and thin film for recording information
JPH07111782B2 (en) * 1986-08-13 1995-11-29 ソニー株式会社 Optical disc recording / reproducing device
JP2810035B2 (en) * 1986-08-22 1998-10-15 株式会社日立製作所 Optical recording / reproducing method
US4799210A (en) * 1986-11-05 1989-01-17 Unisys Corporation Fiber optic read/write head for an optical disk memory system
EP0286326B1 (en) * 1987-04-08 1994-06-15 Nippon Telegraph and Telephone Corporation Method and apparatus for fabricating an optical disc master and an optical disc
US4908815A (en) * 1988-02-22 1990-03-13 Gregg David P Optical recording system utilizing proportional real-time feedback control of recording beam intensity
US5126994A (en) * 1988-11-29 1992-06-30 Sony Corporation Method and apparatus for controlling and detecting recording laser beam
US5070495A (en) * 1989-04-12 1991-12-03 International Business Machines Corporation Write calibration for magnetooptic disk recorders
JP2775009B2 (en) * 1989-06-20 1998-07-09 ソニー株式会社 Optical recording device
DE69014436T2 (en) * 1989-06-23 1995-06-14 Philips Electronics Nv Recording arrangement for applying an information pattern on a radiation-sensitive recording medium.
US5303217A (en) * 1989-06-23 1994-04-12 U.S. Philips Corporation Optical recording device wherein recording beam intensity is set in accordance with an optimum value of the DC component of a recorded signal
JP2984004B2 (en) * 1989-08-28 1999-11-29 ソニー株式会社 Cutting machine
NL9000150A (en) * 1990-01-22 1991-08-16 Philips Nv METHOD AND APPARATUS FOR APPLYING A PATTERN OF AREAS WITH CHANGED OPTICAL PROPERTIES IN A RECORD CARRIER
US5185733A (en) * 1990-03-01 1993-02-09 International Business Machines Corporation Calibrating lasers for optical recording using a maximal readback signal amplitude as a criterion
JP2867591B2 (en) * 1990-04-26 1999-03-08 ソニー株式会社 Control method of recording laser beam
US5268893A (en) * 1991-10-18 1993-12-07 International Business Machines Corporation Write power calibration utilizing least squares fit of read-back signals for moving media memory
US5481530A (en) * 1992-10-20 1996-01-02 Mitsubishi Chemical Corporation High density optical recording method and recording medium
JPH07131089A (en) * 1993-11-08 1995-05-19 Nikon Corp Laser power monitor circuit
US5495466A (en) * 1994-01-10 1996-02-27 Eastman Kodak Company Write verification in an optical recording system by sensing mark formation while writing
EP0968833B1 (en) * 1998-07-03 2004-11-10 Fuji Photo Film Co., Ltd. Image recording apparatus
US7639271B2 (en) * 2004-04-30 2009-12-29 Hewlett-Packard Development Company, L.P. Labeling an optical disc
US20060208199A1 (en) * 2005-03-18 2006-09-21 Uvp Inc. Luminescent calibration
CN112562744B (en) * 2020-07-03 2021-09-03 暨南大学 Double-pulse excitation method for ultrafast and super-resolution full photomagnetic recording

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5760693B2 (en) * 1974-02-12 1982-12-21 Sony Corp
FR2304981A1 (en) * 1975-03-21 1976-10-15 Thomson Brandt OPTICAL INFORMATION RECORDING DEVICE
JPS5369004A (en) * 1976-12-01 1978-06-20 Matsushita Electric Ind Co Ltd Optical recorder-reproducer
NL7802860A (en) * 1978-03-16 1979-09-18 Philips Nv REGISTRATION CARRIER BODY AND REGISTRATION CARRIER FOR OPTICAL INFORMATION AND DEVICE FOR REGISTRATION AND READ OUT.
JPS54143109A (en) * 1978-04-28 1979-11-08 Hitachi Ltd Optical information device
JPS55139693A (en) * 1979-04-17 1980-10-31 Fujitsu Ltd Write system for optical recording medium
JPS56153488A (en) * 1980-04-28 1981-11-27 Mitsubishi Electric Corp Recording device
US4488277A (en) * 1982-02-10 1984-12-11 North American Philips Corporation Control system for an optical data recording apparatus

Also Published As

Publication number Publication date
ES8500494A1 (en) 1984-10-01
EP0109130A3 (en) 1984-07-04
EP0109130A2 (en) 1984-05-23
ATE37625T1 (en) 1988-10-15
EP0109130B1 (en) 1988-09-28
US4562567A (en) 1985-12-31
DE3378142D1 (en) 1988-11-03
AU2114583A (en) 1984-05-17
JPS59116946A (en) 1984-07-06
JPH0473224B2 (en) 1992-11-20
CA1213049A (en) 1986-10-21
ES527159A0 (en) 1984-10-01

Similar Documents

Publication Publication Date Title
AU561989B2 (en) Monitoring pit formation
AU539048B2 (en) Apparatus for writing on optically readable disc
MX149614A (en) IMPROVEMENTS TO A MASTER DISC FOR INFORMATION RECORDING THROUGH LIGHT RADIATION
AU542656B2 (en) Optically readable videodisc with apparatus for recording on/reading from same
JPS5266405A (en) Optical recording system of information recording discs
JPS53133039A (en) Recording method
JPS5622227A (en) Information recording system of optical disk
JPS5320904A (en) Optical information reader
JPS5348704A (en) Optical signal regenerator
JPS53148410A (en) Erasing method of information contents having been recorded recording media
JPS5250702A (en) Optical information recording and reproduction apparatus
JPS53100203A (en) Optical reproducer
JPS5211035A (en) Recording system
JPS5345204A (en) Tracking method for disk-type recording medium
JPS5362502A (en) Optical recording-reproducing apparatus
JPS5778648A (en) Optical recording method
JPS5273702A (en) Information reproduction apparatus
JPS51142208A (en) Method for scanning by laser beam
JPS5250649A (en) Optical information record reproduction device
JPS533202A (en) Information reproducer
JPS5247631A (en) Recording device of laser information
JPS5593537A (en) Optical recording device
JPS5410701A (en) Focus-servo system for optical reproducing apparatus
JPS5399923A (en) Grooveless medium disc for imformation recording
JPS526540A (en) Optical recording and reproducing methods for signals